<template>
  <ul class="todo-list">
    <!-- completed: 完成的类名 -->
    <li :class="{completed : obj.isDone}" v-for="(obj, index) in arr" :key="obj.id">
      <div class="view">
        <input class="toggle" type="checkbox" v-model="obj.isDone" />
        <label>{{obj.name}}</label>
        <button class="destroy" @click="elFN(index)"></button>
      </div>
    </li>
  </ul>

</template>

<script>
  export default {
    props: ['arr', 'index'],
    methods: {
      elFN(index) {
        this.$emit('el', index)
      }
    }
  }
</script>